DropDownButton should allow for group styles

Describe the feature

Currently it seems like the DropDownButton does not allow for grouping items together (as for example seen in the ComboBox). The snipped below is an implementation of it in the Demo App, that should work, but doesnt seem like it does.

            <Controls:DropDownButton Margin="5"
                                     Content="Genres"
                                     DisplayMemberPath="Name"
                                     ItemsSource="{Binding Source={x:Static models:SampleData.Genres}}">
                <Controls:DropDownButton.GroupStyle>
                    <GroupStyle>
                        <GroupStyle.HeaderTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding Path=Name}"/>
                            </DataTemplate>
                        </GroupStyle.HeaderTemplate>
                    </GroupStyle>
                </Controls:DropDownButton.GroupStyle>
            </Controls:DropDownButton>

Additional context

[AKruimink]

I had a look at the spitbutton yesterday, didn’t offer much more to me then the dropdown button already did. The optimal controller would have been the combobox, was it not for the hassle it introduces when trying to deselect an item from the viewmodel, thats wat got me to use the DropDownButton, i assumed it would offer support for headers (which i was wrong in).

That being said, i did some resorting of my list and it looks alot cleaner now even without the headers, and don’t think would should change wat the DropDown is right now, and try to make it into a controller that it isn’t/isn’t suppoe to be.

[timunie]

Maybe the SplitButton can be used for your need case?